Disable invalid offsetof warning in runtime, ras, control

In order to allow OMR_WARNINGS_AS_ERRORS to be enabled across the
JIT, disable -Winvalid-offsetof on gcc and clang builds while work
is done to refactor relevant classes to be standard-layout type
so offsetof can be used

Signed-off-by: Dylan Tuttle <jdylantuttle@gmail.com>

runtime/compiler/control/J9Options.cpp

@@ -60,7 +60,22 @@
 #include "j9jitnls.h"
 #endif
 
+#if defined(__clang__)
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Winvalid-offsetof"
+#elif defined(__GNUC__) || defined(__GNUG__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Winvalid-offsetof"
+#endif
+
 #define SET_OPTION_BIT(x)   TR::Options::setBit,   offsetof(OMR::Options,_options[(x)&TR_OWM]), ((x)&~TR_OWM)
+
+#if defined(__clang__)
+#pragma clang diagnostic pop
+#elif defined(__GNUC__) || defined(__GNUG__)
+#pragma GCC diagnostic pop
+#endif
+
 //Default code cache total max memory percentage set to 25% of physical RAM for low memory systems
 #define CODECACHE_DEFAULT_MAXRAMPERCENTAGE 25
 // For use with TPROF only, disable JVMPI hooks even if -Xrun is specified.

runtime/compiler/ras/kca_offsets_generator.cpp

@@ -205,9 +205,22 @@ J9::Options::kcaOffsets(const char *option, void *, TR::OptionTable *entry)
       fprintf( file, "#define OSTHREAD_TID               (%" OMR_PRIuSIZE ")\n", offsetof(J9AbstractThread,tid) );
 
       fprintf( file, "#define J9JITSTACKATLAS_MAPBYTES   (%" OMR_PRIuSIZE ")\n", offsetof(J9JITStackAtlas,numberOfMapBytes) );
+
+#if defined(__clang__)
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Winvalid-offsetof"
+#elif defined(__GNUC__) || defined(__GNUG__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Winvalid-offsetof"
+#endif
       fprintf( file, "#define BODYINFO_HOTNESS           (%" OMR_PRIuSIZE ")\n", offsetof(TR_PersistentJittedBodyInfo,_hotness) );
       fprintf( file, "#define PERSISTENTINFO_CHTABLE     (%" OMR_PRIuSIZE ")\n", offsetof(TR::PersistentInfo,_persistentCHTable) );
       fprintf( file, "#define PERSISTENTCLASS_VISITED    (%" OMR_PRIuSIZE ")\n", offsetof(TR_PersistentClassInfo,_visitedStatus) );
+#if defined(__clang__)
+#pragma clang diagnostic pop
+#elif defined(__GNUC__) || defined(__GNUG__)
+#pragma GCC diagnostic pop
+#endif
 
       fprintf( file, "#define ELS_OLDELS                 (%" OMR_PRIuSIZE ")\n", offsetof(J9VMEntryLocalStorage,oldEntryLocalStorage) );
       fprintf( file, "#define ELS_I2JSTATE               (%" OMR_PRIuSIZE ")\n", offsetof(J9VMEntryLocalStorage,i2jState) );

runtime/compiler/runtime/J9ValueProfiler.hpp

@@ -339,8 +339,21 @@ class TR_HashTableProfilerInfo : public TR_AbstractHashTableProfilerInfo
        TR_AbstractHashTableProfilerInfo(bci, bits, hash, kind)
       {}
 
+#if defined(__clang__)
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Winvalid-offsetof"
+#elif defined(__GNUC__) || defined(__GNUG__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Winvalid-offsetof"
+#endif
    size_t getLockOffset() { return offsetof(TR_HashTableProfilerInfo<T>, _metaData.otherIndex); }
    size_t getHashOffset() { return offsetof(TR_HashTableProfilerInfo<T>, _hashConfig); }
+#if defined(__clang__)
+#pragma clang diagnostic pop
+#elif defined(__GNUC__) || defined(__GNUG__)
+#pragma GCC diagnostic pop
+#endif
+
    TR::DataType getDataType() { return sizeof(T) <= 4 ? TR::Int32 : TR::Int64; }
 
    /**
@@ -404,8 +417,21 @@ class TR_EmbeddedHashTable : public TR_HashTableProfilerInfo<T>
       }
 
    bool resetLowFreqKeys();
+
+#if defined(__clang__)
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Winvalid-offsetof"
+#elif defined(__GNUC__) || defined(__GNUG__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Winvalid-offsetof"
+#endif
    size_t getKeysOffset() { return offsetof(this_t, _keys); }
    size_t getFreqOffset() { return offsetof(this_t, _freqs); }
+#if defined(__clang__)
+#pragma clang diagnostic pop
+#elif defined(__GNUC__) || defined(__GNUG__)
+#pragma GCC diagnostic pop
+#endif
 
    protected:
    typedef TR_EmbeddedHashTable<T, bits> this_t;